X - -sink straotee



Feb. 21, 1928; w 0 1,660,010

' G. J. LEMM SINK STRAINER Filed April 15, 1927 Fig. 5.

GoH/vard J Lemm Patented Feb. 21, 1928.

eo'r'rmmn J. LEMM, or reasons, waszrmeron.

SINK STRAINER.

Application fiiealr rn 13,

This invention relates to devices adapted.

to close the drain of the sink when it is desiredto hold the watertherein and to act as a strainer when the water is running freelytherethrough. The objects of this invention are first, to provide adevice which will fit in any drain pipe opening of approximatecorresponding size; second, whichwill pre vent leakage around thestrainer when the said opening is oversize; third, which will provide asuitable bearing to center the disk valve thereof; fourth, which willhold the said disk valve tightly down in place, thus preventing any diskand the strainer; fifth, in which the respective parts may be stampedfrom sheet metal; and sixth, whichis cheaptomake and to assemble, easyto operate, and effective in use.

I attain these and other objects by the devlces and arrangementsillustrated in the accompanying drawings, all made on an enlarged scale,in which :'Fig. 1 is a section of a sink drain showing my improvedstrainer mounted therein, taken on the line 11 in Fig. 2; Fig. 2 is a.plan view thereof; Fig. 3 is an elevation of the disk valve; Fig. 4: isan elevation of the strainer, a part thereof being shown insection; Fig.5 'is a plan view of the outer ring; Fig. 6 is an elevation thereof,showing a part thereof in section; Fig. 7 is a sectionof the springwasher; and Fig. 8 is an elevation of the securing rivet.

Similar numerals of reference refer to similar parts throughout theseveral views.

In practice, it is foundthat the diameter of the orifice ofthe drainpipe 1 varies within comparatively widelimits and therefore, if astrainer is made smallenough to enter a smaller such orifice, then thereis excessive leakage around such a strainer if inserted in a larger suchorifice. Also the flange or shoulder formed in the orifice of the drainpipe 1 isusually very small and the internal diameter thereof may begreater than the external diameter of thestrainer and therefore therewould be nothing to hold the strainer inplace.

I have overcome both of these practical objections by means of the ringillustrated in Figs. 5 and 6. This ring 2 is split as shown in Fig. 6and is preferably made of spring material and curved to a largerdiameter than the maximum allowed for the particular size of strainer.The split is grit coming between the 1927. Serial No. 183,291.

made with a horizontal portion 3 as shown in said Fig. 6, therebypreventing leakage of Water downward through the split. The ring 2 isprovided with an inturned flange 4: as shown in the drawings. This ringis manually compressed and forced into the orifice of the drain pipe 1and rests on the shoulder therein.

The strainer body comprises a plate or disk 5, having openings 6arranged 'around its center,- and having a downturned flange 7 aroundits outer circumference. This flange 7 is provided with a wide shallowgroove 8 adapted to receive a packing material 9 therein. The center ofthe disk 5 is depressed or countersunk as shown at 10 in Figsal and 4:.This strainer body is inserted'into the inside of the ring 2, the packmgmaterial 9 filling the space between the ring and the strainer body,thereby preventing any leakage through the space be tween these parts.The lower edge of the flange 7 of the strainer body rests on top of theflange 4 of the ring 2.

The valve disk 11 is composed of a circular piece of sheet metal havingholes 12, corresponding with the above holes 6 in the disk 5 of thestrainer body, punched therein. One such hole, however, is punched tobenda part of. one side upward to form an operating lug 13. The centerof the circular disk 11 is countersunk as shown at 14.. The saidcountersunk portion 1a fits into the countersunk part 10 of the disk 5.A central hole passes vertically through both of the said countersunkportions 10 and 14.

The two parts 5 and 11 are secured to gether by means of a rivet 15,which passes upward through the holes in the said countersunk parts andwhich is riveted into the countersunk portion 14 of the disk 11. Inpractice, however, it is found better to pr0- vlde a spring pressurebetween the plates 5 and 11, in order to hold them tightly together andprevent any grit entering between them and yet permitting the disk 11 tohave free motion on top of the disk 5. In order to secure thisresilience in the simplest and cheapest Way I provide a spring washer16,, such as is illustrated in Fig.7, between the head of the rivet 15and the lower end of the countersunk part 10 of the disk 5, thus drawingthe disk 11 downward thereon. This spring washer 16 comprises a thinpiece of spring material, such as brass, having its outer edge splitinto sections and rolled back towards the center to form a circular ringof a substantially circular section and having a hole in its center.iiVhen the rivet 15 is insorted through the opening formed by the rolledback outer section of the said washer and through the hole therein tobring its head in contact therewith, and is then passed through theholes in the countersunk parts 10 and 14 and is pressed to compress thesaid spring washer and is then riveted in the countersunk part 14, thesaid parts 5 and 11 are securely fastened together with a resilientpressure derived from the compression of said spring washer.

Thus it will be seen that l have provided a device which can be fittedinto the orifice of any drain pipe of corresponding size and which willbe held therein without leakage of any water therepassed, which will befirmly supported within the orifice of the drain pipe, and which willopen or close the passage therethrough by the rotation of the disk 11 onthe disk 5.

It is, of course, understood that many changes in the details ot'theconstruction of such a device maybe made without departin; from the ideaof my invention as outlined in the appended claims.

It "is to be understood that, in such cases where the valve action isnot desired, the disk 11 may be entirely'omitted, in which casetheopenings 6 in the. disk 5 will always permit the water to passtherethrough.

Having therefore described my invention what I claim is r 1. In a sinkstrainer, the combinationot a split ring adapted to be compressed to litin the orifice of the drain pipe; a flange extending inward therefrom; astrainer body, comprising a disk having openings therein and a flangearound its circumfen once, said strainer body being adapted to rest onsaid inward extendin flange of said ring; and packing means interposedbetween said ring and said flange of the strainer body.;

2. In a sink strainer the combination of the strainer body comprising adisk having countersunk portion of said strainer body disk; at rivetpassing through the centers or said countersunk portions and securingthe valve disk to the strainer body disk; and a resilient washerinterposed between the end of said rivet and said countersunk portionstrainer body being adapted to rest on said inward extendingsplit ringflange; a valve disk provided with openings therein, corresponding withand complementary to the openings in said strainer body; a riveted pivotmeans connecting said valve disk to said strainer body disk and adaptedto permit the valve disk to turn on the strainer body disk; andspringmeans interposed between said riveted pivot means and said strainer bodydisk whereby the valve disk is resiliently held in contact with saidstrainer body disk.

4. In a sink strainer, the combination of a. split ring adapted to becompressed to fit in the orifice of the drain pipe, the surfaces of saidring, at the point of separation, forming a sliding sealed joint; astrainer body comprising a disk having openings therein and a flangearound its circumference, said strainer body being adapted to engage andto be supported by said split ring.

5.. In a sink strainer, the combination of a strainer body comprising adisk, having openings therein and provided with a downwardly extendingcircumterentially grooved flange around its periphery; with an inwardlycompressible sealing ring adapted to be compressed to lit in the orificeof the drain pipe and lying partially in said circumferentialgroove insaid flange.

6. In a sink strainer, the combination of a strainer body comprising adisk, having openings therein and provided with a. downwardly extendingcircumferontially grooved flange around its periphery; with a selfexpanding sealing ring adapted to be compressed to enter the orifice ofthe drain pipe and to expand itself into sealed contact therewith, andextending inward therefrom to fit and support the said strainer bodyflange.

GOTTHARD J. LlElil'M.

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